Environment-friendly calcium oxide ultrafine grinding process and complete equipment thereof

Abstract

The invention discloses an environment-friendly calcium oxide ultrafine grinding process and complete equipment thereof. The production process comprises the following steps: 1, feeding and primary crushing: feeding calcium oxide hermetically, and crushing the calcium oxide preliminarily and scattering preliminarily the refined particles at the same time; 2, superfine crushing and scattering: crushing the particles to be 1250 meshes, and crushing the particles while scattering to avoid particles agglomeration; 3, anti-adsorption grading: preventing the powdered particles from being absorbed on blades, and grading the qualified powdered particles at one time; 4, anti-adsorption finished product collection: collecting the powdered particles adhered to inner walls of a collection box through the expansion of a gas bag; 5, ultrafine calcium oxide discharging and packaging. In addition, the process further comprises auxiliary steps of removing dust from tail gas, circulating hot air and the like. According to the environment-friendly calcium oxide ultrafine grinding process and the complete equipment thereof, the whole set of equipment is reasonable in matching, energy consumption is effectively reduced, and dust pollution can be minimized in the production process; and the problem of adhesion and agglomeration of the calcium oxide in production can be solved, the production efficiency is improved, and the calcium oxide with high fineness and high purity is prepared.

Description

technical field [0001] The invention belongs to the field of mechanical manufacturing, and in particular relates to an environment-friendly calcium oxide superfine crushing process and a complete set of equipment. Background technique [0002] Defoaming masterbatch, also known as water-absorbing masterbatch or moisture-removing masterbatch, is a new type of functional masterbatch, which is mainly used for the production of plastic products from recycled plastics. When PE, PP, PS and other recycled plastics are used for product production, since the raw materials contain a small amount of moisture, this has a very serious impact on the production of plastic products. The use of defoaming masterbatch only needs to be added to the raw materials without any adjustments to the production process of the product, which can eliminate the problems of air bubbles, moiré, cracks, spots and other problems caused by moisture, and has no adverse effects on the physical and mechanical prop...

AI Technical Summary

Problems solved by technology

[0005] First, the fineness is not enough

The Raymond machine is mainly suitable for the production of 100 mesh to 400 mesh powder. If it is necessary to produce powder with higher fineness, secondary classification is required, and the investment in equipment will increase, and the power consumption per ton of finished product needs to increase by more than 150 yuan, from Economically, it is not worthwhile

[0006] Second, the dust pollution is large

When the Raymond machine is used to crush calcium oxide, due to the insufficient sealing of the feeding and dust removal process, there is a problem of dust pollution. On the one hand, it affects the health of the operating workers, and on the other hand, the environmental protection of the enterprise is not up to date, affecting production, or causing related costs. A substantial increase

[0007] Third, it affects the purity of calcium oxide

When the Raymond machine is used to produce calcium oxide, because the production process is not sealed enough, when the calcium oxide is in contact with the air, it will absorb the moisture in the air. At this time, some calcium oxide will chemically react with the moisture in the air and become hydrogen oxide. Calcium, thereby affecting the purity and use value of the final product

[0008] Fourth, the issue of reunion

Due to the strong viscosity of calcium oxide, it is easy to agglomerate during the crushing process and affect the crushing effect, while the Raymond machine does not have a corresponding breaking device

[0009] Fifth, calcium oxide is highly viscous and affects cutting

Calcium oxide has strong viscosity, so in the process of collecting finished products, a large amount of calcium oxide powder is adsorbed on the wall of the cylinder. During production, the wall of the cylinder needs to be knocked continuously, which will easily deform the wall of the cylinder over time and increase the labor intensity of the workers.

[0010] Sixth, calcium oxide is highly viscous and affects grading

Calcium oxide has a strong viscosity, so it is easy to stick to the blades of the classifier, which will affect the classification accuracy and classification efficiency, so it is necessary to open the classifier cylinder frequently to clean the calcium oxide powder adsorbed on the classifier impeller during production , not only increases the labor intensity of workers, but also affects the fineness stability of the final product

[0011] For ultrafine grinding of calcium oxide, a small number of manufacturers use ball milling or similar mechanical grinding processes. When ball milling or similar mechanical grinding processes are used, although the problem of fineness is solved and the dust removal effect is better than that of Raymond machines, there are still Feed sealing problems, agglomeration and dispersal problems, classifier adsorption problems, and discharge collection box adsorption problems

[0012] To sum up, under the existing process and equipment conditions, the preparation of ultrafine calcium oxide powder has become a major problem in the industry, which seriously restricts the further development of the defoaming masterbatch industry

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